kernel.git/fs/nfs/idmap.c, branch linux-3.18.y

KEYS: Remove key_type::match in favour of overriding default by match_preparse

2014-09-16T16:36:06Z

A previous patch added a ->match_preparse() method to the key type. This is allowed to override the function called by the iteration algorithm. Therefore, we can just set a default that simply checks for an exact match of the key description with the original criterion data and allow match_preparse to override it as needed. The key_type::match op is then redundant and can be removed, as can the user_match() function. Signed-off-by: David Howells Acked-by: Vivek Goyal

Merge branch 'keys-fixes' into keys-next

2014-07-22T20:55:45Z

Signed-off-by: David Howells

KEYS: user: Use key preparsing

2014-07-22T20:46:17Z

Make use of key preparsing in user-defined and logon keys so that quota size determination can take place prior to keyring locking when a key is being added. Also the idmapper key types need to change to match as they use the user-defined key type routines. Signed-off-by: David Howells Acked-by: Steve Dickson Acked-by: Jeff Layton

KEYS: Allow special keys (eg. DNS results) to be invalidated by CAP_SYS_ADMIN

2014-07-17T19:45:08Z

Special kernel keys, such as those used to hold DNS results for AFS, CIFS and NFS and those used to hold idmapper results for NFS, used to be 'invalidateable' with key_revoke(). However, since the default permissions for keys were reduced: Commit: 96b5c8fea6c0861621051290d705ec2e971963f1 KEYS: Reduce initial permissions on keys it has become impossible to do this. Add a key flag (KEY_FLAG_ROOT_CAN_INVAL) that will permit a key to be invalidated by root. This should not be used for system keyrings as the garbage collector will try and remove any invalidate key. For system keyrings, KEY_FLAG_ROOT_CAN_CLEAR can be used instead. After this, from userspace, keyctl_invalidate() and "keyctl invalidate" can be used by any possessor of CAP_SYS_ADMIN (typically root) to invalidate DNS and idmapper keys. Invalidated keys are immediately garbage collected and will be immediately rerequested if needed again. Signed-off-by: David Howells Tested-by: Steve Dickson

NFSv4: Convert idmapper to use the new framework for pipefs dentries

2013-09-01T15:12:42Z

Signed-off-by: Trond Myklebust

NFSv4: Fix a potentially Oopsable condition in __nfs_idmap_unregister

2013-08-30T13:19:38Z

Ensure that __nfs_idmap_unregister can be called twice without consequences. Signed-off-by: Trond Myklebust

NFSv4: Add tracepoints for debugging the idmapper

2013-08-22T12:58:25Z

Add tracepoints to help debug uid/gid mappings to username/group. Signed-off-by: Trond Myklebust

NFSv4: Deal with a sparse warning in nfs_idmap_get_key()

2013-08-22T12:58:15Z

Signed-off-by: Trond Myklebust Cc: Bryan Schumaker

NFS: Improve legacy idmapping fallback

2013-06-28T19:22:07Z

Fallback should happen only when the request_key() call fails, because this indicates that there was a problem running the nfsidmap program. We shouldn't call the legacy code if the error was elsewhere. Signed-off-by: Bryan Schumaker Signed-off-by: Trond Myklebust

NFSv4: Fix the string length returned by the idmapper

2013-03-20T20:45:16Z

Functions like nfs_map_uid_to_name() and nfs_map_gid_to_group() are expected to return a string without any terminating NUL character. Regression introduced by commit 57e62324e469e092ecc6c94a7a86fe4bd6ac5172 (NFS: Store the legacy idmapper result in the keyring). Reported-by: Dave Chiluk Signed-off-by: Trond Myklebust Cc: Bryan Schumaker Cc: stable@vger.kernel.org [>=3.4]